Abstract
Physicochemical characteristics of ‘Phosphatic Slag’ from a phosphorus manufacturing plant in Bhavnagar in Gujarat State were studied with the object of determining its suitability in the manufacture of low cost industrial ceramic products like wall tile, LT insulators, crockery and novelty wares as well as opaque glazes. The results showed that the phosphatic slag is a solid solution of calcium silicate and fluoride containing calcium oxide and silica as major constituents but associated with impurities like sulphur trioxide, fluorine, phosphorous pentoxide, alumina etc. The study also revealed that the material could be used as substitute of calcium and silica bearing materials like calcite, wollastonite etc, up to 18.5 wt% in opaque glazes, about 10 wt% in crockery and novelty wares and up to 30 wt% in earthenware wall tile bodies. The products developed also conformed to the respective BIS Specifications as required for commercial utilisation.
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